US1488657A - Press - Google Patents

Description

April 1, 1924;

I. A. WEAVER PRESS Filed March 5, 1923 2 Sheets-Sheet 1 mnlldm vApril 1 1924. 1,488,657

u. A. WEAVER PRESS Filed March 5, 1923 2 Sheets-Sheet 2 mgm a III l llllln;

patented Apr. l, i924.

unirse stares FRA. A. WEAVER, OF SPRINGFIELD, ILLINOIS, ASSIG'NOR T0 WEAVER MANUFACTUR--' PATENT OFFICE.

ENG COMPANY, OF SPRINGFIELD, ILLNOIS, A CORPORATION F ILLINOIS.

PRESS.

Application led March 5, 1923. Serial No. 622,772.

To all whom t may concern:

Be it known that I, IRA A. WEAVER, a citizen of the United States, residing at Springfield, in the county of Sangamon and State oflllinois, have invented certain new and useful Improvements in Presses, of which the following is a specification.

My invention pertains to presses or presv sure-applying mechanisms of the general type and style set forth in my earlier United States Patent No. 1,180,896, granted April 25, 1916, the present improvements relating more particularly to the means for actuating the element which performs the pressing or forcing function.

With some classes of work, only a com` paratively small pressure is required, whereas with other types of work a greater pressure alone is needed, and with otherr kinds of work a strong pressure is desirable at lirst, to be followed by a lesser pressure.

The new mechanism aims to meet all of these requirements, and, accordingly, a nut and screw means is `provided to afford a great mechanical advantage when that is needed, and an associated pinion and rack is supplied to apply a lesser pressure when permissible with a more quickly operating mechanism.

In some cases, the two mechanisms are used in combination or conjunction, the screw being adjusted to the correct length to bring the handle which operates the pinion to the most favorable or advantageous position for action so that such handle or hand lever which works the pinion may be used to obtain a maximum amount of power, which is usually large or excessive when starting a mandrel or forcing a bushing.

The advantage of this combination over two separate presses of different vcapacities resides in the fact that should the workman attempt to operate on what he believes to be a job requiring a power within the force of the rack and pinion and a greater power where needed, the work would not have to be removed to a high-powered press, but the screw mechanism which is somewhat slower, but many times more powerful, could be brought into action to start the load, the job being finished with the screw or the lever operating the pinion and rack according to the judgment of the worlnnan, making the press very desirable for lightworlr, as well as for jobs too heavy for the rack andfpinion type of mechanism.

yTo enable those skilled in this rart to havea full and complete understanding of the new device, both from structural and functional standpoints, l have illustrated a rpreferred embodiment of the invention in the accompanying drawings forming a part of this specification and throughout the several views of which like reference characters refer to the saine parts. In these drawings:

Fig. 1 is a fragmentary elevation ofthe improved press;

Fig. 2 is an enlarged vertical section through the central part of thek structure;

Fig. 3 is a horizontal section through the pinion and associated parts;

Fig. 4 is a fragmentary plan view of thel entire press, with certain portions broken away; Fig. 5 illustrates the operating mechanism in perspective; f

Fig. 6 is a vertical cross-section through the central portion of the press; and

Fig. is an enlarged horizontal section on line 7 7 of Fig. 6. i i

In this preferred embodiment of the invention, the frame comprises a bar of chanA nel cross-section bent to provide a pair of spaced vertical legs 11 and 12 which at their upper ends are connected together by an integral inverted V-shaped portion or crossmember 13, the marginal flanges of such bar projecting outwardly, as is clearly illustrated.

At their lower ends,.the legs have elongated feet (not fully shown) securely fas-` tened thereto, and at their upper portions such legs are connected together by a horizontal lcross channel-bar 14 with its flanges f presented upwardly, the opposite ends of such bar being fastened to the inner faces of the two legs of the frame by angle brackets 15 and suitable rivets or bolts 16.

A hollow casting 17 of suitable shape for the reception of the upper portion of the vertical pressing screw 18 is interposed between the horizontal web of the cross-bar 14 and the apex 0f the main frame, and has an enlarged properlyfshaped upper end 19 fastened to the latter.

rlhe lower end of the hollow castingl?, as

insane? Stated somewhat otherwise, those skilled in this art will appreciate the great convenience and saving of time afforded by being able to complete the job, whatever pressure is required, without having to move the work from a small arbor press to a heavier screw press, or vice versa, as is usually necessary. n

When pressure on the screw is developed by turning the hand or power wheel, the two cam-faced thrust-washers 39 and il tend to climb against each other, but the pressure can be instantly relieved by one reverse stroke of the lever, which reverses their action regardless of the amount of pressure and permits the screw to be spun up quickly by the hand wheel.

This invention is not limited and restricted to the precise and exact details of structure presented, and it is susceptible of a variety of embodiments, all falling within the scope of the appended claims.

I claim:

l. In a press, the combination of a slidably-mounted apertured sleeve, ya pinion and rack to slide said sleeve, ahandle to actuate said pinion and rack, a screw-threaded shaft extended through said sleeve aperture, means to prevent said shaft from turning, and a revoluble nut mounted on said sleeve and having a threaded connection with said shaft, whereby the latter may be moved bodily longitudinally by the pinion and rack and may be adjusted lengthwise by said nut. f

2. ln a press, the combination of a frame having an apertured cross-bar, a sleeve slidable through said aperture and provided with a rack, a pinion in mesh with `said rack, a handle to rock said pinion and to slide said sleeve longitudinally through said pinion land rack connection, a thrust-collar on said sleeve adapted to bear against said cross-bar, a ratchet wheel revolubly supported on said thrust-collar, a quick release de-l vice between said ratchet ywheel and thrustcollar, a screw-threaded shaft slidable in said sleeve and thrust-collar and having a threaded engagement with said ratchet wheel, the latter forming a nut for the shaft, means to prevent said shaft from turning whereby rotation of the ratchet wheel effects lengthwise movement of the shaft, a second handle, and a pawl connection between said second handle and said ratchet wheel.

3. ln a press, the combination of a frame having an apertured cross-bar, a sleeve slidable through said yaperture and provided with a rack, a pinion in mesh with said rack, a handle to rock said pinion and to slide said sleeve longitudinally through said pinion and rack connection, a thrust-collar on said sleeve adapted to bear against said cross-bar,a wheel revolubly supported on said thrust-collar, a quick-release device between said wheel and thrust-collar, a screw'- threaded shaft slidable in said sleeve and thrust-collar and having a threaded engagement with said wheel, the latter forming a nut for the shaft, and means to prevent said shaft from turning whereby rotation of the wheel effects lengthwise movement ofthe shaft. f

In witness whereof I have hereunto set my hand and seal. f

IRA A. WEAVER. [L 5.]

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